Quests about CDB in QTCreator

[oiniya]

1, how to debug the last line in the function?
eg,
@if (result == STATUS_OK)
{
int output;
result = TryMore(&output);
}@
when I set the break point in the line "result = TryMore(&output);" and want to look at the value of output
the debugger will jump out of the "if" sentence directly.
So I must add some extra codes behind the "result = TryMore(&output);" to make the debugger stop.
just like:
@if (result == STATUS_OK)
{
int output;
result = TryMore(&output);
int n = 0;
n = 1;
}@

2, If I set the symbol path/server in the CDB it's slowly to start the debugger.But the I got the recommended in formation from QTCreator.
what's the matter if I didn't set the symbol?